SIEMENS 6ES7341-1CH02-0AE0

Overview

SIEMENS 6ES7341-1CH02-0AE0 is a SIMATIC S7-300 CP 341 point-to-point communication processor equipped with RS422/485 interface. It is a slot module for S7-300 PLC rack, used for serial data exchange between the S7-300 CPU and third-party serial devices. SIEMENS 6ES7341-1CH02-0AE0 entered phase-out status starting October 01, 2023, and it is widely supplied as exchange spare for S7-300 cabinet overhaul and serial communication retrofit.

Features

SIEMENS 6ES7341-1CH02-0AE0 supports native protocols including ASCII, 3964R and RK512. Modbus RTU master/slave function requires an optional Modbus software dongle package 6ES7870-1AA01-0YA0, which adds Modbus communication capability for inverters, meters and remote serial instruments. SIEMENS 6ES7341-1CH02-0AE0 handles serial framing, parity check and data buffering independently of the S7 CPU, reducing CPU cycle load from continuous serial polling. It works with STEP7 for hardware configuration and parameter assignment, and supports diagnostic status feedback to the PLC program for communication fault alarm and SCADA logging. SIEMENS 6ES7341-1CH02-0AE0 carries onboard LED indicators for power, transmission and reception status, which helps field technicians troubleshoot wiring and handshake issues quickly. It complies with CE and UL standards for standard control cabinet installation.

Specs

SIEMENS 6ES7341-1CH02-0AE0 Platform: SIMATIC S7-300. Type: CP341 communication processor. Interface: RS422 / RS485. Power supply: 24VDC from S7 backplane bus. Native protocols: ASCII, 3964R, RK512. Optional protocol: Modbus RTU (with software license dongle). Mounting: S7-300 U rack slot. This is not an I/O module; it is a dedicated serial communication processor. SIEMENS 6ES7341-1CH02-0AE0 is widely supplied as service replacement spare for serial instrument communication failure.

Principle

SIEMENS 6ES7341-1CH02-0AE0 exchanges data with the S7 CPU via the S7 backplane bus. The module converts PLC send/receive data buffers into serial frames and transmits them over the RS422/485 bus to slave devices. Received serial data is verified and stored in dedicated receive buffers for the CPU to read. If checksum error, timeout or cable break is detected, the module sets diagnostic bits and sends fault signals to the user program. The independent processing architecture of SIEMENS 6ES7341-1CH02-0AE0 prevents slow serial communication from blocking the main PLC scan cycle.

Applications

SIEMENS 6ES7341-1CH02-0AE0 is deployed for connecting flow meters, energy meters, weigh controllers, legacy inverters and barcode readers on packaging, water treatment and metal processing production lines. It is selected for spare inventory and cabinet retrofit projects for existing S7-300 serial communication systems. Modern replacement platform is Siemens S7-1500 with CM PtP communication modules.